Days to next anniversary

[Roger Govier]

Not sure what happened with that posting???. Hope this comes out
clearer.

Hi Ron

Very nice solution.
Just need to remember that the whole world doesn't use US date
formats!<vbg>.

It gives some strange results in the UK unless you modify to
=IF(A1,LOOKUP(365,((TEXT(A1,"dd/mm/")&YEAR(TODAY())+{0,1})-TODAY())),"")And if you are after reducing formula length, then in addition to Biff'sNOW() in place of TODAY() you can trim another 2 characters byusing"m/d/" or "d/m/" in place of the double dd and double mm--RegardsRoger Govier"Roger Govier" <[email protected]> wrote in messageHi Ron>> Very nice solution.> Just need to remember that the whole world doesn't use US dateformats!<vbg>.> It gives some strange results in the UK unless you modify to>=IF(A1,LOOKUP(365,((TEXT(A1,"dd/mm/")&YEAR(TODAY())+{0,1})-TODAY())),"")And if you are after reducing formula length, then in addition toBiff'sNOW() in place of TODAY() you can trim another 2 characters byusing"m/d/" or "d/m/" in place of the double dd and doublemm--RegardsRoger Govier"Ron Coderre"<[email protected]> wrote inmessagetext and future values wouldn't be entered as astartdate>>=IF(A1,LOOKUP(365,((TEXT(A1,"mm/dd/")&YEAR(TODAY())+{0,1})-TODAY())),"")>> ***********> Regards,> Ron>> XL2002, WinXP>>> "RonCoderre" wrote:>>> ...or even a fewmore...>>>>=IF(A1<>"",LOOKUP(365,((TEXT(A1,"mm/dd/")&YEAR(TODAY())+{0,1})-TODAY())),"")>>>> (I thought it would get tripped up by a start dateof02/29/2000...but, so>> far so good.)>> ***********>> Regards,>>Ron>>>> XL2002, WinXP>>>>>> "T. Valko" wrote:>>>> > Let's trim some morecharacters:>> >>> > No longer need the call to ABS:>> >>>>=DATE(YEAR(NOW())+(DATEVALUE(MONTH(A1)&"/"&DAY(A1))<TODAY()),MONTH(A1),DAY(A1))-TODAY()>> >>> > -->> > Biff>> > Microsoft Excel MVP>> >>> >>> >"T. Valko" <[email protected]> wrote in message>> >> > Character count?Where's your error checking? <g>>> > >>> > > I was trying to come upwith a shortcut for:>> > >>> > >+(DATE(YEAR(TODAY()),MONTH(A1),DAY(A1))<TODAY()>> > >>> > > But thisdidn't work (I didn't test it enough):>> > >>> > >+(MONTH(TODAY())>MONTH(A2))>> > >>> > > This seems to work and I stillretain the character count title<g>:>> > >>> >>=ABS(DATE(YEAR(NOW())+(DATEVALUE(MONTH(A1)&"/"&DAY(A1))<TODAY()),MONTH(A1),DAY(A1))-TODAY())>> > >>> > > But I still like having some errorchecking:>> > >>> >>=IF(OR(A1="",A1>TODAY()),"",ABS(DATE(YEAR(NOW())+(DATEVALUE(MONTH(A1)&"/"&DAY(A1))<TODAY()),MONTH(A1),DAY(A1))-TODAY()))>> > >>> > > -->> > >Biff>> > > Microsoft Excel MVP>> > >>> > >>> > > "Rick Rothstein (MVP -VB)" <[email protected]>wrote in>> > > message> >>> I want to show thenumber of days between the current date(today)>> > >>> and the hiringdate in order to provide an indication of howmany days>> > >>> is theanniversary away. Any suggestions?>> > >>>> > >> Here is my offering(assumes "hire date" is in A1)...>> > >>>> >>>=DATEDIF(TODAY(),DATE(YEAR(TODAY())+(DATE(YEAR(TODAY()),MONTH(A1),DAY(A1))<TODAY()),MONTH(A1),DAY(A1)),"d")>> > >>>> > >> While charactercount is not an absolute metric, I note thatthis>> > >> formula is theshortest one offered so far except for Biff's,mine is one>> > >>character longer than Biff's formula; but, as Sandy pointed out,Biff>> >>> will have to modify his formula to account for the problem Sandyhas>>> >> pointed out, so we will see how things shake out on thecharactercount>> > >> later.>> > >>>> > >> Rick>> > >>> > >>> >>> >>> >>

 

[Roger Govier]

Still messed up, even though clear on my screen before posting. Last
attempt.

Hi Ron

Very nice solution.
Just need to remember that the whole world doesn't use US date
formats!<vbg>.
It gives some strange results in the UK unless you modify to

=IF(A1,LOOKUP(365,((TEXT(A1,"dd/mm/")&YEAR(TODAY())+{0,1})-TODAY())),"")And if you are after reducing formula length, then in addition to Biff'sNOW() in place of TODAY()you can trim another 2 characters by using "m/d/" or "d/m/" in placeof the double "dd "and double "mm".--RegardsRoger Govier"Roger Govier" <[email protected]> wrote in messageNot sure what happened with that posting???. Hope this comes outclearer.>> Hi Ron>> Very nice solution.> Just need to remember that the whole world doesn't use US dateformats!<vbg>.>> It gives some strange results in the UK unless you modify to>=IF(A1,LOOKUP(365,((TEXT(A1,"dd/mm/")&YEAR(TODAY())+{0,1})-TODAY())),"")And if you are after reducing formula length, then in addition toBiff'sNOW() in place of TODAY() you can trim another 2 charactersbyusing"m/d/" or "d/m/" in place of the double dd and doublemm--RegardsRoger Govier"Roger Govier" <[email protected]>wrote in messageHiRon>> Very nice solution.> Just need to remember that the whole worlddoesn't use US dateformats!<vbg>.> It gives some strange results in theUK unless you modifyto>=IF(A1,LOOKUP(365,((TEXT(A1,"dd/mm/")&YEAR(TODAY())+{0,1})-TODAY())),"")And if you are after reducing formula length, then in additiontoBiff'sNOW() in place of TODAY() you can trim another 2 charactersbyusing"m/d/" or "d/m/" in place of the double dd anddoublemm--RegardsRoger Govier"RonCoderre"<[email protected]> wroteinmessagetext and future values wouldn't be entered asastartdate>>=IF(A1,LOOKUP(365,((TEXT(A1,"mm/dd/")&YEAR(TODAY())+{0,1})-TODAY())),"")>> ***********> Regards,> Ron>> XL2002, WinXP>>>"RonCoderre" wrote:>>> ...or even afewmore...>>>>=IF(A1<>"",LOOKUP(365,((TEXT(A1,"mm/dd/")&YEAR(TODAY())+{0,1})-TODAY())),"")>>>> (I thought it would get tripped up by a startdateof02/29/2000...but, so>> far so good.)>> ***********>>Regards,>>Ron>>>> XL2002, WinXP>>>>>> "T. Valko" wrote:>>>> > Let's trimsome morecharacters:>> >>> > No longer need the call to ABS:>>>>>>=DATE(YEAR(NOW())+(DATEVALUE(MONTH(A1)&"/"&DAY(A1))<TODAY()),MONTH(A1),DAY(A1))-TODAY()>> >>> > -->> > Biff>> > Microsoft Excel MVP>> >>>>>> >"T. Valko" <[email protected]> wrote in message>>>> > Charactercount?Where's your error checking? <g>>> > >>> > > I was trying to comeupwith a shortcut for:>> > >>> >>+(DATE(YEAR(TODAY()),MONTH(A1),DAY(A1))<TODAY()>> > >>> > > Butthisdidn't work (I didn't test it enough):>> > >>> >>+(MONTH(TODAY())>MONTH(A2))>> > >>> > > This seems to work and Istillretain the character count title<g>:>> > >>>>>=ABS(DATE(YEAR(NOW())+(DATEVALUE(MONTH(A1)&"/"&DAY(A1))<TODAY()),MONTH(A1),DAY(A1))-TODAY())>> > >>> > > But I still like having someerrorchecking:>> > >>>>>=IF(OR(A1="",A1>TODAY()),"",ABS(DATE(YEAR(NOW())+(DATEVALUE(MONTH(A1)&"/"&DAY(A1))<TODAY()),MONTH(A1),DAY(A1))-TODAY()))>> > >>> > > -->> >>Biff>> > > Microsoft Excel MVP>> > >>> > >>> > > "Rick Rothstein(MVP -VB)" <[email protected]>wrote in>> > >message> >>> I want toshow thenumber of days between the current date(today)>> > >>> and thehiringdate in order to provide an indication of howmany days>> > >>> istheanniversary away. Any suggestions?>> > >>>> > >> Here is myoffering(assumes "hire date" is in A1)...>> > >>>>>>>=DATEDIF(TODAY(),DATE(YEAR(TODAY())+(DATE(YEAR(TODAY()),MONTH(A1),DAY(A1))<TODAY()),MONTH(A1),DAY(A1)),"d")>> > >>>> > >> Whilecharactercount is not an absolute metric, I note thatthis>> > >>formula is theshortest one offered so far except for Biff's,mine isone>> > >>character longer than Biff's formula; but, as Sandy pointedout,Biff>> >>> will have to modify his formula to account for theproblem Sandyhas>>> >> pointed out, so we will see how things shake outon thecharactercount>> > >> later.>> > >>>> > >> Rick>> > >>> > >>> >>>>>> >>>

 

[Guest]

Thanks, Roger

and, very true about the date format....But, I had it in the back of my mind
that the formula could easily be tweaked for non-US date formats. Hopefully,
that holds true.

***********
Best Regards,
Ron

XL2002, WinXP

 

[Guest]

Thanks, Biff

BTW...I wasn't trying to concoct the shortest possible formula. It's just
that formulas that wrap to the next line always make me wince (It's probably
just a harmless character flaw <g>). Anyway, I usually stop tweaking if it
gets to one line.

***********
Regards,
Ron

XL2002, WinXP

 

[Roger Govier]

Hi Ron

Don't know what was going on with my previous replies getting screwed
up.
Yes is does work for UK, provided you switch the month and day around
=IF(A1,LOOKUP(365,((TEXT(A1,"d/m/")&YEAR(TODAY())+{0,1})-TODAY())),"")

 

[Rick Rothstein \(MVP - VB\)]

...or even a few more...

=IF(A1<>"",LOOKUP(365,((TEXT(A1,"mm/dd/")&YEAR(TODAY())+{0,1})-TODAY())),"")

(I thought it would get tripped up by a start date of 02/29/2000...
but, so far so good.)

Nope, unfortunately your "thought" was correct... this formula, and your and
Biff's subsequent modifications to it, do get tripped up by a start date of
02/29/2000 (or any February 29th in a proper leap year)... it happens
whenever the "TODAY" date is anywhere within the range of January 1st to
February 28th.

As it turns out, ALL of the formulas submitted so far (including Ron's and
its variations) will produce an incorrect calculation if the TODAY date is
anywhere within the range of January 1st to February 28th of a NON leap year
and the start date is any day on or after March 1st of a leap year... under
those conditions, the date difference will be one day less than it is
supposed to be. To test what I am saying, try a Start Date of March 1, 2000
and a TODAY date of February 27, 2007. There should be 3 days difference
between these days (Feb 28, Feb 29 and Mar 1), but all formulas report 2
days... and this missing day is carried forward for Start Dates up to and
including December 31, 2007.

Rick

 

[Rick Rothstein \(MVP - VB\)]

We can trim a couple more:

=IF(A1,LOOKUP(365,((TEXT(A1,"m/d/")&YEAR(NOW())+{0,1})-TODAY())),"")

Startin' to look pretty good!

Upon further testing of my previous offering I find it fails if the hire
date is a leap day so I'll put that in the round file and "stash" this
beauty cooked up by Ron.

Nope, it is not starting to look good at all... this formula, and Ron's
original, also get tripped up by a start date of 02/29/2000 (or any February
29th in a proper leap year)... it happens whenever the "TODAY" date is
anywhere within the range of January 1st to February 28th. Unfortunately,
that is the least of the problems...

As it turns out, ALL of the formulas submitted so far (including Ron's and
its variations) will produce an incorrect calculation if the TODAY date is
anywhere within the range of January 1st to February 28th of a NON leap year
and the start date is any day on or after March 1st of a leap year... under
those conditions, the date difference will be one day less than it is
supposed to be. To test what I am saying, try a Start Date of March 1, 2000
and a TODAY date of February 27, 2007. There should be 3 days difference
between these days (Feb 28, Feb 29 and Mar 1), but all formulas report 2
days... and this missing day is carried forward for Start Dates up to and
including December 31, 2007.

Rick

 

[Rick Rothstein \(MVP - VB\)]

Don't know what was going on with my previous replies getting

screwed up.

Yeah, that was strange.

Yes is does work for UK, provided you switch the month and day around
=IF(A1,LOOKUP(365,((TEXT(A1,"d/m/")&YEAR(TODAY())+{0,1})-TODAY())),"")

Actually, it won't work properly as there is a flaw in it, and in ALL of the
other formulas as well... see either of my two latest postings for the
explanation.

Rick

 

[Guest]

Perhaps I'm being dense....but....

Hire Date: 01-MAR-2000
Today : 27-FEB-2007

Per the formula: 2 days until the next anniversary date

The math:
Hire Date Anniversary: 01-MAR-2007
Less: Today's date : 27-FEB-2007
Equals : 2 days

Can you clarify what you discovered?

***********
Regards,
Ron

XL2002, WinXP

 

[Rick Rothstein \(MVP - VB\)]

No, you are not dense... there is a problem, but it is not year-long like I
first thought... it occurs for a start date of February 29th of a leap year
with a TODAY date between January 1st and February 28th of a non leap year.

Hire Date: 29-FEB-2004 (or any leap year)
Today: 27-FEB-2007 (or any non leap year)
Calculated Difference = 2 days

Hire Date: 1-MAR-2004 (or any leap year)
Today: 27-FEB-2007 (or any non leap year)
Calculated Difference = 2 days

Both Hire dates produce the same difference. I mistakenly thought that
carried throughout the year, but the problem actually is how to handle the
collapsing of the leap day into years where that date does not exist.

Rick

 

[Guest]

Ok....I think I may have solved that issue:

=IF(A1,LOOKUP(365,DATE(YEAR(NOW())+{0,1},MONTH(A1),DAY(A1)-1)+1-TODAY()),"")

(Amusing....all this fuss to accommodate a one-day-every-four-years
occurrence.)

***********
Regards,
Ron

XL2002, WinXP

 

[Rick Rothstein \(MVP - VB\)]

Yes, it looks like that takes care of the error generated for a February
29th start date (and it still is significantly shorter than the formula I
posted<g>); but the (probably unsolvable) problem of how to deal with
February 29th start dates when the TODAY value is before March 1st of a non
leap year remains. I guess a February 29th and March 1st leap year start
dates will always be the same number of days away from the TODAY date for
that condition. Perhaps the best way to handle this is never set a start
date of leap year... make it company policy to push a February 29th start
date to the first business day on or after March 1st.

Rick

 

[T. Valko]

To fix this you'd need to subtract 1 if the start date is a leap day and
YEAR(TODAY()) is a non-leap year. What I came up with to do this is just as
long as the original formula:

-AND(MONTH(A2)=2,DAY(A2)=29,ISERR(--TEXT("2/29/"&YEAR(NOW()),"m/d/yy")))

 

[Rick Rothstein \(MVP - VB\)]

While you can subtract (or even add) 1 to the start date, I just don't know
that there is a "fix" for the problem. In a non-leap year, there is no
February 29th; so if the start date is February 29th, you are stuck
considering it as February 28th (last day of the month stays last day of the
month) or as March 1st (the day after February 28th stays the day after
February 28th) for non leap years... there is no "correct" solution for the
problem... a company will just have to make a policy decision on how they
are willing to collapse February 29th into non leap years (or, as I
suggested sort of tongue-in-cheek earlier, simply never allow February 29th
to be a start date for an employee).

Rick

 

[Rick Rothstein \(MVP - VB\)]

-AND(MONTH(A2)=2,DAY(A2)=29,ISERR(--TEXT("2/29/"&YEAR(NOW()),"m/d/yy")))

That non-leap year test of yours...

ISERR(--TEXT("2/29/"&YEAR(NOW()),"m/d/yy")))

Why so many characters?

ISERR(VALUE("2/29/"&YEAR(now())))

Savings? Eleven characters (sorry, couldn't resist). <g>

Yes, I properly should be using DATEVALUE but, for the test being performed,
I am pretty sure VALUE will work fine.

Rick

 

[Rick Rothstein \(MVP - VB\)]

-AND(MONTH(A2)=2,DAY(A2)=29,ISERR(--TEXT("2/29/"&YEAR(NOW()),"m/d/yy")))

That non-leap year test of yours...

ISERR(--TEXT("2/29/"&YEAR(NOW()),"m/d/yy")))

Why so many characters?

ISERR(VALUE("2/29/"&YEAR(now())))

Savings? Eleven characters (sorry, couldn't resist). <g>

More straight forward than the above...

(MONTH(DATE(YEAR(NOW()),2,29))=3)

Same number of characters though :-(

Rick

 

[T. Valko]

I almost always go with what first pops into my head and after I've commited
myself is when I start thinking of alternatives.

Like:

=ISERR(--("2/29/"&YEAR(NOW())))

There seems to be almost no limit when it comes to "building" dates. We
discussed this a while back. I was playing around and discoverd that stuff
like this works but it shouldn't (at least you would think that it
shouldn't):

A1 = July

=MONTH(A1&1)

A1 = July1

=MONTH(A1)

A1 = July0

=MONTH(A1)

People started chimming in that they also never realized this sort of stuff
worked.

I finally understand what you mean about that 2/29 vs 3/1 deal. I think
adding 1 to the start date (if a leap day) is the way to go and be done with
it!

If someone was born on 2/29/2000 when do they *legally* become 1 year old?
2/28/2001 or 3/1/2001?

Damn those leap years! <g>